Actividad 3.1. Analizador léxico A01635390

labs/04/lex3.1/Makefile

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+all:
+	lex lex.l
+	gcc lex.yy.c -o lex -ll
+	python3 code_generator.py > example.ac
+	./lex example.ac
+
+
+clean:
+	rm -rf *.c
+	rm -rf lex

labs/04/lex3.1/code_generator.py

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+import string
+import random
+import argparse
+
+def id_generator(size=10, chars=string.ascii_uppercase + string.digits):
+    return ''.join(random.choice(chars) for _ in range(size))
+
+opreators = ["+","-","*","/"]
+
+def get_comment_line():
+    comment_line = "//%s" % (id_generator())
+    return comment_line
+
+def get_float_line():
+    float_line = "f %s" % (random.choice(string.ascii_lowercase))
+    return float_line
+
+def get_integer_line():
+    integer_line = "i %s"% (random.choice(string.ascii_lowercase))
+    return integer_line
+
+def get_asigment_line():
+    asigment_line = "%s = %s" %(random.choice(string.ascii_lowercase),\
+        random.randint(0,100))
+    return asigment_line
+
+def get_asigment_line_2():
+    asigment_line_2 = "%s = %s %s %s" % \
+            (random.choice(string.ascii_lowercase),\
+            random.choice(string.ascii_lowercase),\
+            random.choice(opreators),\
+            random.randint(0,100))
+    return asigment_line_2
+
+def get_print_line():
+    print_line = "p %s" % (random.choice(string.ascii_lowercase))
+    return print_line
+
+
+parser = argparse.ArgumentParser(description='Generate random AC code')
+parser.add_argument('--stress', dest='stress', action='store_true',\
+        help='generate HUGE code to stress the lab')
+args = parser.parse_args()
+
+if args.stress:
+    f= open("random_code.ac","w+")
+    for x in range(0, 100000):
+        comment_line = get_comment_line()
+        float_line = get_float_line()
+        integer_line = get_integer_line()
+        asigment_line = get_asigment_line()
+        asigment_line_2 = get_asigment_line_2()
+        print_line = get_print_line()
+
+        f.write(comment_line + "\n")
+        f.write(float_line + "\n")
+        f.write(integer_line + "\n")
+        f.write(asigment_line+ "\n")
+        f.write(asigment_line_2 + "\n")
+        f.write(print_line + "\n")
+
+    f.close()
+
+else:
+    comment_line = get_comment_line()
+    float_line = get_float_line()
+    integer_line = get_integer_line()
+    asigment_line = get_asigment_line()
+    asigment_line_2 = get_asigment_line_2()
+    print_line = get_print_line()
+
+    print(comment_line)
+    print(float_line)
+    print(integer_line)
+    print(asigment_line)
+    print(asigment_line_2)
+    print(print_line)
+

labs/04/lex3.1/example.ac

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+//5Z2K793IIA
+f u
+i y
+t = 76
+z = i - 62
+p e

labs/04/lex3.1/lex.l

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+%{
+#include <stdio.h>
+%}
+
+VARIABLE    [a-zA-Z][a-zA-Z0-9]*  
+INT      [0-9]+
+FLOAT       [0-9]+\.[0-9]+
+FLOAT_DECLARATION   "f"
+INT_DECLARATION     "i"
+PRINT               "p"
+
+%%
+"//".*                                                                         {printf("COMMENT\n");}
+
+{FLOAT_DECLARATION}[ \t]{VARIABLE}                                                     {printf("floatdcl id\n");}
+{INT_DECLARATION}[ \t]{VARIABLE}                                                     {printf("intdcl id\n");}
+
+{VARIABLE}[ \t]=[ \t]{INT}                                          {printf("id assign inum\n");}
+
+{VARIABLE}[ \t]=[ \t]{VARIABLE}[ \t]*\+[ \t]{FLOAT} {printf("id assign id plus fnum\n");}
+{VARIABLE}[ \t]=[ \t]{VARIABLE}[ \t]*-[ \t]{FLOAT} {printf("id assign id minus fnum\n");}
+{VARIABLE}[ \t]=[ \t]{VARIABLE}[ \t]*\*[ \t]{FLOAT} {printf("id assign id times fnum\n");}
+{VARIABLE}[ \t]=[ \t]{VARIABLE}[ \t]*\/[ \t]{FLOAT} {printf("id assign id over fnum\n");}
+
+{VARIABLE}[ \t]=[ \t]{VARIABLE}[ \t]*\+[ \t]{INT}         {printf("id assign id plus inum\n");}
+{VARIABLE}[ \t]=[ \t]{VARIABLE}[ \t]*-[ \t]{INT}          {printf("id assign id minus inum\n");}
+{VARIABLE}[ \t]=[ \t]{VARIABLE}[ \t]*\*[ \t]{INT}         {printf("id assign id times inum\n");}
+{VARIABLE}[ \t]=[ \t]{VARIABLE}[ \t]*\/[ \t]{INT}         {printf("id assign id over inum\n");}
+
+{PRINT}[ \t]{VARIABLE}                                                     {printf("print id\n"); }
+[ \t\n]                                                                        {/* whitespace */ }
+
+%%
+
+int main(int argc, char **argv) {
+    FILE    *fd;
+    if (argc == 2)
+    {
+        if (!(fd = fopen(argv[1], "r")))
+        {
+            perror("Error: ");
+            return (-1);
+        }
+        yyset_in(fd);
+        yylex();
+        fclose(fd);
+    }
+    else
+        printf("Usage: a.out filename\n");
+    return (0);
+}